Dense suspensions of hard particles in a liquid can exhibit strikingly counter-intuitive behaviour, such as discontinuous shear thickening (DST)^{1,2,3,4,5,6,7} and reversible shear jamming (SJ) into a state where flow is arrested and the suspension is solid-like^8,9,10,11,12. A stress-activated crossover from hydrodynamic interactions to frictional particle contacts is key for these behaviours^{2,3,4,6,7,9,13}. However, in experiments, many suspensions show only DST, not SJ. Here we show that particle surface chemistry plays a central role in creating conditions that make SJ readily observable. We find the system’s ability to form interparticle hydrogen bonds when sheared into contact elicits SJ. We demonstrate this with charge-stabilized polymer microspheres and non-spherical cornstarch particles, controlling hydrogen bond formation with solvents. The propensity for SJ is quantified by tensile tests¹² and linked to an enhanced friction by atomic force microscopy. Our results extend the fundamental understanding of the SJ mechanism and open avenues for designing strongly non-Newtonian fluids.

硬质颗粒在液体中的密集悬浮液会表现出惊人的违反直觉的行为，例如不连续剪切增稠（DST）^{1,2,3,4,5,6,7}和可逆剪切堵塞（SJ）进入流动状态被捕，悬架是实心的^8,9,10,11,12。从流体动力相互作用到摩擦颗粒接触的应力激活交叉是这些行为的关键^{2,3,4,6,7,9,13}。但是，在实验中，许多悬浮液仅显示DST，而不显示SJ。在这里，我们证明了粒子表面化学在创造使SJ易于观察的条件中起着核心作用。我们发现系统被剪切成接触引发SJ时形成颗粒间氢键的能力。我们用电荷稳定的聚合物微球和非球形玉米淀粉颗粒，通过溶剂控制氢键的形成来证明这一点。SJ的倾向通过拉伸试验^12进行量化，并通过原子力显微镜与增加的摩擦力联系起来。我们的结果扩展了对SJ机理的基本理解，并为设计非牛顿流体提供了开放的途径。